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<blockquote data-quote="WayneF" data-source="post: 543036" data-attributes="member: 12496">On a Nikon flash, the 14 mm and the M is because you have the pull-out fold-down diffuser covering the flash head.&nbsp; &nbsp; Put it back to remove the 14 mm and the M.&nbsp; Or the dome on some Nikon flashes.&nbsp; I don't think any of the Yongnuo have the head switches to detect this.Firing early does not make sense to me, but the flash is much weaker with the 14mm diffuser pulled down.&nbsp; Get up close once to see if it still appears not to work at 14mm.&nbsp; And HSS mode only has about 20% power anyway, you might think that is not working. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />The M can also be because you manually zoomed the flash away from the automatic lens zoom which it normally follows.&nbsp; See the flash manual about procedure to remove the M, but generally on a Nikon flash, the way is that you manually zoom the flash to the same current value as the lens.&nbsp; On a Yongnuo flash, you manually zoom to the blank position just lower than the 24mm position, which is Auto.Sorry, I kept drifting off into Nikon mode.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />&nbsp; But basic operation is about the same.200 flashes seems reasonable for higher power levels.&nbsp; It is a big flash, uses more than a little flash.&nbsp; Also you said HSS mode, so it will be at high power.&nbsp; I don't know your goals, but that is probably a questionable choice (if using HSS shutter speeds).&nbsp; Certainly indoors it is questionable.</blockquote>

[QUOTE="WayneF, post: 543036, member: 12496"] On a Nikon flash, the 14 mm and the M is because you have the pull-out fold-down diffuser covering the flash head. Put it back to remove the 14 mm and the M. Or the dome on some Nikon flashes. I don't think any of the Yongnuo have the head switches to detect this. Firing early does not make sense to me, but the flash is much weaker with the 14mm diffuser pulled down. Get up close once to see if it still appears not to work at 14mm. And HSS mode only has about 20% power anyway, you might think that is not working. :) The M can also be because you manually zoomed the flash away from the automatic lens zoom which it normally follows. See the flash manual about procedure to remove the M, but generally on a Nikon flash, the way is that you manually zoom the flash to the same current value as the lens. On a Yongnuo flash, you manually zoom to the blank position just lower than the 24mm position, which is Auto. Sorry, I kept drifting off into Nikon mode. :) But basic operation is about the same. 200 flashes seems reasonable for higher power levels. It is a big flash, uses more than a little flash. Also you said HSS mode, so it will be at high power. I don't know your goals, but that is probably a questionable choice (if using HSS shutter speeds). Certainly indoors it is questionable. [/QUOTE]

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